Survey of virus diseases on some major vegetable crops in some ecological zones of Ghana

2006 ◽  
Vol 38 (2) ◽  
Author(s):  
JNL Lamptey ◽  
FO Anno-Nyako ◽  
NS Olympio
Keyword(s):  
Vegetable Crops ◽  
Virus Diseases ◽  
Ecological Zones

Virus Diseases of Vegetable Crops in Apulia XXVIII. Broad Bean Stain

1982 ◽  
Vol 104 (2) ◽  
pp. 115-123 ◽  
Author(s):  
M. Russo ◽  
V. Savino ◽  
C. Vovlas
Keyword(s):  
Broad Bean ◽  
Vegetable Crops ◽  
Virus Diseases

scholarly journals Economic analysis of risks in fruit and vegetable farming in Osun state, Nigeria

2012 ◽  
Vol 37 (3) ◽  
pp. 473-491 ◽  
Author(s):  
SB Fakayode ◽  
MAY Rahji ◽  
ST Adeniyi
Keyword(s):  
Risk Management ◽  
Management Strategies ◽  
Risk Attitude ◽  
Vegetable Crops ◽  
Fruit And Vegetable ◽  
Agricultural Insurance ◽  
Public Intervention ◽  
Ecological Zones ◽  
Vegetable Farmers ◽  
Vegetable Farming

The study analyzed the risks involved in fruit and vegetable farming in Osun state, Nigeria. Specifically, the study examined the risk attitude of farmers, factors influencing risk attitude as well as farmer’s perception on major sources of production and market risks. The study was based on a survey of 150 farmers, comprising 75 predominantly fruit and vegetable farmers, respectively, and covering 12 communities within the six agro-ecological zones in the state. Data were collected using a well structured questionnaire. Descriptive statistics, discriminant analysis and Kruskal–Wallis ranking analysis were used in the study. The study revealed that the average age of the fruit and vegetable respondent was 58.5 and 40.1, respectively, with the male respondents outnumbering the females in each case. The average year of experience was 30.8 and 15.3 for fruit and vegetable respondent, respectively. An average area of (5.36 and 2.21) ha was cultivated by the fruit and vegetable farmers, while orange and okra are the most widely grown fruit and vegetable crops. Damage by pest and disease, traditional methods of farming and weather dependency were the most perceived sources of production risk by the fruit and vegetable farmers. Perishability of produce, low price of produce, poor product handling and packaging as well as exploitation by middlemen were the most perceived sources of market risk. The study also revealed that maintaining good relationship with traders, selling at low prices due to perishability, selling within the locality and non-farm businesses were the major risk management strategies employed by the farmers. Based on the study findings, it is recommended that introduction of a more comprehensive agricultural insurance scheme and introduction of improved technology can ameliorate the effect of risks on fruit and vegetable farmers. Also, public intervention can facilitate better risk management through improved information system. Bangladesh J. Agril. Res. 37(3): 473-491, September 2012 DOI: http://dx.doi.org/10.3329/bjar.v37i3.12125

Search mode for rapid detection of virus particles

1991 ◽  
Vol 49 ◽  
pp. 286-287
Author(s):  
O. E. Bradfute
Keyword(s):  
Electron Microscopy ◽  
Rapid Detection ◽  
Plant Virus ◽  
Low Dose ◽  
Search Mode ◽  
Virus Diseases ◽  
Virus Particles ◽  
Focus Image ◽  
Time Required ◽  
Rapid Switching

Electron microscopy is frequently used in preliminary diagnosis of plant virus diseases by surveying negatively stained preparations of crude extracts of leaf samples. A major limitation of this method is the time required to survey grids when the concentration of virus particles (VPs) is low. A rapid survey of grids for VPs is reported here; the method employs a low magnification, out-of-focus Search Mode similar to that used for low dose electron microscopy of radiation sensitive specimens. A higher magnification, in-focus Confirm Mode is used to photograph or confirm the detection of VPs. Setting up the Search Mode by obtaining an out-of-focus image of the specimen in diffraction (K. H. Downing and W. Chiu, private communications) and pre-aligning the image in Search Mode with the image in Confirm Mode facilitates rapid switching between Modes.

Bacterial and Virus Diseases

1953 ◽  
Vol 23 (1) ◽  
pp. 121
Keyword(s):  
Virus Diseases

Virus Diseases of the Respiratory Tract

1950 ◽  
Vol 34 (6) ◽  
pp. 1637-1652
Author(s):  
Thomas M. Durant ◽  
Charles R. Shuman
Keyword(s):  
Respiratory Tract ◽  
Virus Diseases
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